nanog mailing list archives
RE: A New TransAtlantic Cable System
From: "Rod Beck" <Rod.Beck () hiberniaatlantic com>
Date: Mon, 4 Oct 2010 18:07:43 +0100
Hi Frank, Yes it does include all the O-E conversions. By the way, my recollection is the undersea regenerators do purely optical regeneration. There is no O-E conversions undersea, only at the landing stations and terrestrial components. Since the system is just in the planning stage, the latency estimate is conversative. It is better to surprise than disappoint ... Hi All. It appears we're discussing theoretical limits of silica-based glass here. The Press Release assertion talks about what a trader might experience. Hm. I would ask Rob Beck to clarify this point and inform whether the stated objective in the release accounts for the many o-e and e-o conversions on the overland part of the end-to-end trader connection, including the handoffs that occur in the NY and London metros. I know that terrestrially, i.e., here in the US, some brokerage firms and large banks (is there any longer a distinction between those two today?:) have used their clout to secure links that are virtually entirely optical in nature on routes that are under a thousand miles, but this is not an option on a submarine system that's intrinsically populated with electronics, never mind the tail sections that assume multiple service providers getting into the act. Rob? Anyone? FAC --- Valdis.Kletnieks () vt edu wrote: From: Valdis.Kletnieks () vt edu To: Heath Jones <hj1980 () gmail com> Cc: nanog () nanog org Subject: Re: A New TransAtlantic Cable System Date: Fri, 01 Oct 2010 10:08:50 -0400 On Fri, 01 Oct 2010 15:01:25 BST, Heath Jones said: > > http://finance.yahoo.com/news/Hibernia-Atlantic-to-bw-3184701710.html ?x=0&.v=1 > Sales spam - but still - very close to minimum possible latency! > 3471 miles @ 186,282 miles/s * 1.5 in glass * 2 round trip = 55.9ms. My first thought is that they've found a way to cheat on the 1.5. If you can make it work at 1.4, you get down to 52.2ms - but get it *too* low and all your photons leak out the sides. Hmm.. Unless you have a magic core that runs at 1.1 and a *cladding* that's up around 2.0?
Current thread:
- Re: A New TransAtlantic Cable System Frank A. Coluccio (Oct 02)
- RE: A New TransAtlantic Cable System Rod Beck (Oct 04)
- Re: A New TransAtlantic Cable System Heath Jones (Oct 04)
- Re: A New TransAtlantic Cable System nick hatch (Oct 04)
- Re: A New TransAtlantic Cable System Patrick Giagnocavo (Oct 04)
- Re: A New TransAtlantic Cable System Heath Jones (Oct 04)
- Message not available
- Re: A New TransAtlantic Cable System Heath Jones (Oct 05)
- Re: A New TransAtlantic Cable System Heath Jones (Oct 04)
- Re: A New TransAtlantic Cable System Dorn Hetzel (Oct 04)
- Re: A New TransAtlantic Cable System Randy Bush (Oct 04)
- Re: A New TransAtlantic Cable System Joe Loiacono (Oct 05)
- RE: A New TransAtlantic Cable System Rod Beck (Oct 04)
- RE: A New TransAtlantic Cable System Rod Beck (Oct 04)
- Re: A New TransAtlantic Cable System Nick Hilliard (Oct 05)